/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:57:19,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:57:19,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:57:19,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:57:20,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 02:57:20,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:57:20,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:57:20,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:57:20,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:57:20,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:57:20,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:57:20,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:57:20,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:57:20,039 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:57:20,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:57:20,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:57:20,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:57:20,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:57:20,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:57:20,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:57:20,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:57:20,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:57:20,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:57:20,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:57:20,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:57:20,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:57:20,044 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:57:20,044 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:57:20,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:57:20,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:57:20,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:57:20,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:57:20,045 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:57:20,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:57:20,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:57:20,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:57:20,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:57:20,278 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:57:20,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-01-10 02:57:20,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73150d80/96f42a41e1684127ab2675f0066d2d6f/FLAG6ee309f6a [2022-01-10 02:57:20,794 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:57:20,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-01-10 02:57:20,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73150d80/96f42a41e1684127ab2675f0066d2d6f/FLAG6ee309f6a [2022-01-10 02:57:20,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73150d80/96f42a41e1684127ab2675f0066d2d6f [2022-01-10 02:57:20,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:57:20,832 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:57:20,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:57:20,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:57:20,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:57:20,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:57:20" (1/1) ... [2022-01-10 02:57:20,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c52bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:20, skipping insertion in model container [2022-01-10 02:57:20,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:57:20" (1/1) ... [2022-01-10 02:57:20,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:57:20,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:57:21,025 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2022-01-10 02:57:21,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:57:21,092 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:57:21,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2022-01-10 02:57:21,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:57:21,140 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:57:21,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21 WrapperNode [2022-01-10 02:57:21,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:57:21,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:57:21,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:57:21,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:57:21,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,176 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2022-01-10 02:57:21,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:57:21,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:57:21,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:57:21,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:57:21,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:57:21,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:57:21,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:57:21,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:57:21,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (1/1) ... [2022-01-10 02:57:21,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:57:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:57:21,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 02:57:21,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 02:57:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:57:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:57:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 02:57:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 02:57:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:57:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:57:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 02:57:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 02:57:21,350 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:57:21,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:57:21,880 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:57:21,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:57:21,886 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 02:57:21,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:57:21 BoogieIcfgContainer [2022-01-10 02:57:21,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:57:21,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:57:21,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:57:21,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:57:21,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:57:20" (1/3) ... [2022-01-10 02:57:21,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c53c8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:57:21, skipping insertion in model container [2022-01-10 02:57:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:57:21" (2/3) ... [2022-01-10 02:57:21,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c53c8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:57:21, skipping insertion in model container [2022-01-10 02:57:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:57:21" (3/3) ... [2022-01-10 02:57:21,894 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-01-10 02:57:21,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:57:21,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:57:21,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:57:21,944 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 02:57:21,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:57:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 02:57:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 02:57:21,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:21,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:21,963 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-01-10 02:57:21,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:21,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364034538] [2022-01-10 02:57:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:21,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:21,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:22,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 02:57:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:57:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:57:22,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:57:22,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364034538] [2022-01-10 02:57:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364034538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:57:22,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:57:22,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:57:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601812546] [2022-01-10 02:57:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:57:22,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:57:22,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:57:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:57:22,287 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:57:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:57:22,312 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-01-10 02:57:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:57:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-01-10 02:57:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:57:22,327 INFO L225 Difference]: With dead ends: 61 [2022-01-10 02:57:22,327 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 02:57:22,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:57:22,335 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:57:22,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:57:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 02:57:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 02:57:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 02:57:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-10 02:57:22,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-01-10 02:57:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:57:22,366 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-10 02:57:22,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:57:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-10 02:57:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:57:22,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:22,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:22,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:57:22,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:57:22,582 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-01-10 02:57:22,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120927940] [2022-01-10 02:57:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:22,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:22,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:22,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 02:57:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:22,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:57:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:57:22,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:57:22,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120927940] [2022-01-10 02:57:22,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120927940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:57:22,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:57:22,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 02:57:22,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960445226] [2022-01-10 02:57:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:57:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:57:22,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:57:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:57:22,926 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:57:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:57:23,025 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-10 02:57:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:57:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 02:57:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:57:23,026 INFO L225 Difference]: With dead ends: 37 [2022-01-10 02:57:23,026 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 02:57:23,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:57:23,028 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:57:23,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-01-10 02:57:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 02:57:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 02:57:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 02:57:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-10 02:57:23,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-01-10 02:57:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:57:23,042 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-10 02:57:23,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:57:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-10 02:57:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:57:23,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:23,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:23,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 02:57:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:57:23,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-01-10 02:57:23,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:23,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358286272] [2022-01-10 02:57:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:23,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:23,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:23,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 02:57:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:23,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:57:23,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:57:23,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:57:23,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358286272] [2022-01-10 02:57:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358286272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:57:23,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:57:23,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 02:57:23,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613900137] [2022-01-10 02:57:23,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:57:23,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:57:23,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:57:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:57:23,792 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:57:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:57:25,795 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-10 02:57:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:57:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-10 02:57:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:57:25,804 INFO L225 Difference]: With dead ends: 46 [2022-01-10 02:57:25,804 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 02:57:25,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:57:25,805 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:57:25,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 185 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 02:57:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 02:57:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-01-10 02:57:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 02:57:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-01-10 02:57:25,815 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-01-10 02:57:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:57:25,815 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-01-10 02:57:25,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:57:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-01-10 02:57:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:57:25,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:25,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:25,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:57:26,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:57:26,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-01-10 02:57:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057500817] [2022-01-10 02:57:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:26,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:26,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:26,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 02:57:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:26,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:57:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:57:26,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:57:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:57:26,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:26,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057500817] [2022-01-10 02:57:26,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057500817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:57:26,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:57:26,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 02:57:26,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423822325] [2022-01-10 02:57:26,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:57:26,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 02:57:26,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 02:57:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:57:26,984 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:57:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:57:27,161 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-01-10 02:57:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:57:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-01-10 02:57:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:57:27,165 INFO L225 Difference]: With dead ends: 55 [2022-01-10 02:57:27,165 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 02:57:27,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:57:27,166 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:57:27,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 203 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-10 02:57:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 02:57:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 02:57:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 02:57:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-01-10 02:57:27,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 24 [2022-01-10 02:57:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:57:27,176 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-01-10 02:57:27,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:57:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-01-10 02:57:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:57:27,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:27,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:27,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:57:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:57:27,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-01-10 02:57:27,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618310045] [2022-01-10 02:57:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:27,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:27,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:27,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 02:57:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:57:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:57:28,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:57:28,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618310045] [2022-01-10 02:57:28,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618310045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:57:28,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:57:28,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 02:57:28,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138585612] [2022-01-10 02:57:28,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:57:28,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:57:28,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:57:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:57:28,056 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:57:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:57:29,875 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-01-10 02:57:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:57:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-01-10 02:57:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:57:29,884 INFO L225 Difference]: With dead ends: 55 [2022-01-10 02:57:29,884 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 02:57:29,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:57:29,885 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:57:29,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 174 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 02:57:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 02:57:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-10 02:57:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 02:57:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-01-10 02:57:29,894 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2022-01-10 02:57:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:57:29,894 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-01-10 02:57:29,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:57:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-01-10 02:57:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:57:29,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:57:29,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:57:29,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:57:30,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:57:30,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:57:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:57:30,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-01-10 02:57:30,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:57:30,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329983573] [2022-01-10 02:57:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:57:30,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:57:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:57:30,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:57:30,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 02:57:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:57:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:57:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:57:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:57:30,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:57:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:57:43,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:57:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329983573] [2022-01-10 02:57:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329983573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:57:43,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:57:43,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2022-01-10 02:57:43,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505334960] [2022-01-10 02:57:43,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:57:43,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:57:43,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:57:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:57:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:57:43,040 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:57:50,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 02:58:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:58:03,073 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-01-10 02:58:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 02:58:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-01-10 02:58:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:58:03,101 INFO L225 Difference]: With dead ends: 72 [2022-01-10 02:58:03,101 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 02:58:03,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:58:03,103 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 57 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:58:03,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 370 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 16.4s Time] [2022-01-10 02:58:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 02:58:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-01-10 02:58:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 02:58:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-01-10 02:58:03,115 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 27 [2022-01-10 02:58:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:58:03,116 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-01-10 02:58:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:58:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-01-10 02:58:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:58:03,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:58:03,117 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:58:03,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:58:03,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:58:03,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:58:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:58:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1262313396, now seen corresponding path program 2 times [2022-01-10 02:58:03,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:58:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923570515] [2022-01-10 02:58:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:58:03,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:58:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:58:03,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:58:03,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:58:03,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:58:03,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:58:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:58:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:58:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:58:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:58:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:58:04,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:58:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923570515] [2022-01-10 02:58:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923570515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:58:04,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:58:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2022-01-10 02:58:04,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750325697] [2022-01-10 02:58:04,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:58:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 02:58:04,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:58:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 02:58:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:58:04,996 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:58:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:58:05,894 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-01-10 02:58:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 02:58:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-01-10 02:58:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:58:05,896 INFO L225 Difference]: With dead ends: 100 [2022-01-10 02:58:05,896 INFO L226 Difference]: Without dead ends: 93 [2022-01-10 02:58:05,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-10 02:58:05,897 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:58:05,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-01-10 02:58:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-10 02:58:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-01-10 02:58:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 02:58:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-01-10 02:58:05,908 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 29 [2022-01-10 02:58:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:58:05,908 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-01-10 02:58:05,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:58:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-01-10 02:58:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:58:05,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:58:05,910 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:58:05,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:58:06,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:58:06,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:58:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:58:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-01-10 02:58:06,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:58:06,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131481967] [2022-01-10 02:58:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:58:06,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:58:06,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:58:06,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:58:06,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:58:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:58:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:58:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:58:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:58:07,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:58:07,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:58:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131481967] [2022-01-10 02:58:07,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131481967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:58:07,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:58:07,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 02:58:07,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844003199] [2022-01-10 02:58:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:58:07,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:58:07,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:58:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:58:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:58:07,127 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:58:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:58:08,363 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2022-01-10 02:58:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:58:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-01-10 02:58:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:58:08,399 INFO L225 Difference]: With dead ends: 92 [2022-01-10 02:58:08,399 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 02:58:08,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:58:08,400 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:58:08,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 212 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 22 Unchecked, 1.1s Time] [2022-01-10 02:58:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 02:58:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-10 02:58:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 67 states have internal predecessors, (80), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 02:58:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-01-10 02:58:08,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 32 [2022-01-10 02:58:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:58:08,411 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-01-10 02:58:08,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:58:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-01-10 02:58:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:58:08,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:58:08,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:58:08,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:58:08,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:58:08,628 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:58:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:58:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-01-10 02:58:08,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:58:08,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930851040] [2022-01-10 02:58:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:58:08,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:58:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:58:08,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:58:08,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:58:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:58:08,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:58:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:58:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:58:10,065 INFO L328 TraceCheckSpWp]: Computing backward predicates...